Preheat oven to 425 degrees F
Wash potatoes and cut them in half
Score potatoes into a diamond shape with a sharp knife
Transfer potatoes to a large bowl and toss with olive oil, parsley, garlic powder and salt
Grate the parmigiano reggiano cheese
Pour melted butter on top of cheese and mix until you get a thick paste
Transfer the mixture to a large baking dish and spread into an even layer
Press each potato half into the cheese, cut side down
Repeat until all potatoes are in the dish
Bake for 25-26 minutes
Remove from the oven and let potatoes rest for 10 minutes so the cheese hardens
Use a spatula to remove potatoes from the pan
Break into pieces and serve
